explicit_bzero(3bsd) - Man pages

explicit_bzero(3bsd)                 LOCAL                explicit_bzero(3bsd)

NAME
     explicit_bzero — write zeroes to a byte string

LIBRARY
     Utility functions from BSD systems (libbsd, -lbsd)

SYNOPSIS
     #include <string.h>
     (See libbsd(7) for include usage.)

     void
     explicit_bzero(void *buf, size_t len);

DESCRIPTION
     The explicit_bzero() function writes len zero bytes to the string buf.
     If len is zero, explicit_bzero() does nothing.

     The explicit_bzero() variant behaves the same as the bzero() function,
     but will not be removed by a compiler's dead store optimization pass,
     making it useful for clearing sensitive memory such as a password.

SEE ALSO
     bzero(3), memset(3), swab(3)

HISTORY
     The explicit_bzero() function first appeared in OpenBSD 5.5, glibc 2.25.

BSD                            January 22, 2014                            BSD

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